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Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order

Topological defects have been explored in different fields ranging from condensed matter physics and particle physics to cosmology. In condensed matter, strong coupling between charge, spin, and lattice degrees of freedom brings about emergent excitations with topological characteristics at low ener...

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Detalles Bibliográficos
Autores principales: Sunami, K., Nishikawa, T., Miyagawa, K., Horiuchi, S., Kato, R., Miyamoto, T., Okamoto, H., Kanoda, K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6269158/
https://www.ncbi.nlm.nih.gov/pubmed/30515457
http://dx.doi.org/10.1126/sciadv.aau7725
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author Sunami, K.
Nishikawa, T.
Miyagawa, K.
Horiuchi, S.
Kato, R.
Miyamoto, T.
Okamoto, H.
Kanoda, K.
author_facet Sunami, K.
Nishikawa, T.
Miyagawa, K.
Horiuchi, S.
Kato, R.
Miyamoto, T.
Okamoto, H.
Kanoda, K.
author_sort Sunami, K.
collection PubMed
description Topological defects have been explored in different fields ranging from condensed matter physics and particle physics to cosmology. In condensed matter, strong coupling between charge, spin, and lattice degrees of freedom brings about emergent excitations with topological characteristics at low energies. One-dimensional (1D) systems with degenerate dimerization patterns are typical stages for the generation of topological defects, dubbed “solitons”; for instance, charged solitons are responsible for high electrical conductivity in doped trans-polyacetylene. Here, we provide evidence based on a nuclear magnetic resonance (NMR) study for mobile spin solitons deconfined from a strongly charge-lattice–coupled spin-singlet ferroelectric order in a quasi-1D organic charge-transfer complex. The NMR spectral shift and relaxation rate associated with static and dynamic spin susceptibilities indicate that the ferroelectric order is violated by dilute solitonic spin excitations, which were further demonstrated to move diffusively by the frequency dependence of the relaxation rate. The traveling solitons revealed here may promise the emergence of anomalous electrical and thermal transport.
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spelling pubmed-62691582018-12-04 Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order Sunami, K. Nishikawa, T. Miyagawa, K. Horiuchi, S. Kato, R. Miyamoto, T. Okamoto, H. Kanoda, K. Sci Adv Research Articles Topological defects have been explored in different fields ranging from condensed matter physics and particle physics to cosmology. In condensed matter, strong coupling between charge, spin, and lattice degrees of freedom brings about emergent excitations with topological characteristics at low energies. One-dimensional (1D) systems with degenerate dimerization patterns are typical stages for the generation of topological defects, dubbed “solitons”; for instance, charged solitons are responsible for high electrical conductivity in doped trans-polyacetylene. Here, we provide evidence based on a nuclear magnetic resonance (NMR) study for mobile spin solitons deconfined from a strongly charge-lattice–coupled spin-singlet ferroelectric order in a quasi-1D organic charge-transfer complex. The NMR spectral shift and relaxation rate associated with static and dynamic spin susceptibilities indicate that the ferroelectric order is violated by dilute solitonic spin excitations, which were further demonstrated to move diffusively by the frequency dependence of the relaxation rate. The traveling solitons revealed here may promise the emergence of anomalous electrical and thermal transport. American Association for the Advancement of Science 2018-11-30 /pmc/articles/PMC6269158/ /pubmed/30515457 http://dx.doi.org/10.1126/sciadv.aau7725 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Sunami, K.
Nishikawa, T.
Miyagawa, K.
Horiuchi, S.
Kato, R.
Miyamoto, T.
Okamoto, H.
Kanoda, K.
Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title_full Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title_fullStr Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title_full_unstemmed Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title_short Evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
title_sort evidence for solitonic spin excitations from a charge-lattice–coupled ferroelectric order
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6269158/
https://www.ncbi.nlm.nih.gov/pubmed/30515457
http://dx.doi.org/10.1126/sciadv.aau7725
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